Chapter 267 We also want the Sword of Dalmos!
Chapter 267 We also want the Sword of Dalmos!
Looking at Kang Chi surrounded by everyone, Chief Shen just smiled and clapped his hands, and did not come forward to congratulate him.
At this moment, he could not find any words to praise this young man except shock and relief.
When his hands were tired of clapping, he could not help but rub his eyes gently, and found that he did not know when the corners of his eyes were a little wet…
Originally, I just wanted to come and see it with my own eyes because I heard that Kang Chi had built a large bypass engine.
I didn’t expect that I would accidentally witness a new historical record.
If it weren’t for Kang Chi, this world record might not be broken by China in his lifetime…
What he is struggling with now is whether it is necessary to announce this major technological advancement to the world.
For such news that can excite the whole country, it would be best if it could be made public.
This will greatly enhance the national self-confidence and pride of the Chinese people.
At the same time, the advent of this engine also means that China already has the strength to manufacture super-large strategic transport aircraft and stealth strategic bombers.
This will greatly enhance China’s international status and strategic deterrence.
However, if it is made public, it is equivalent to losing a trump card. If the situation of overturning the table really happens, there will be one less means to surprise the enemy.
However, judging from the current situation, the possibility of overturning the table is still relatively low, so the effect of enhancing deterrence should be the best.
So instead of hiding it, it should be publicized!
Of course, the timing of publicity is also very important.
For most ordinary people who don’t know about aviation engines, it is definitely not as intuitive to see aviation engines as to see airplanes, so things can be slowed down first, at least after the Y-20S test flight, and then the publicity effect will be best.
Even if he could hold back a little longer, he could come up with a bigger trick…
Just when Chief Shen’s heart had already flown to Yanjing and he was about to report the major scientific research progress to the Elders’ Council in person, the heated atmosphere on the scene finally slowly calmed down.
Just now, after a simple celebration, Yan Hui and the test team took the lead in entering the test room and began to dismantle the engine on the test bench, which made everyone think that the first round of testing today had ended.
But unexpectedly, after removing the engine, they rotated the test bench 180 degrees and then began to reinstall the engine.
This move immediately confused everyone.
The first round of testing was mainly to test the performance parameters of the engine, and it should have been completed.
Dong Jun couldn’t help but ask Kang Chi: “Today’s test is not over yet?”
”Well, there is one last test left.”
”What test?”
”Reverse thrust test.”
”Reverse thrust? Your engine actually has a reverse thrust device!!”
Dong Jun’s heart suddenly beat violently, and he almost doubted whether he would die here today…
He panted and slowly turned his eyes to the real-time picture of the test workshop, carefully observing the rear half of the engine.
Large aircraft require a very large braking force distance due to their overall weight, so they are very picky about airports, and even a slightly shorter runway will not work.
If the runway is slippery on rainy days, a longer safety distance must be reserved.
As for extreme situations such as runway icing, unless the runway is de-iced in advance, it may not be able to stop even at ten kilometers.
Therefore, relying solely on spoilers on the wings and landing gear and other braking means is far from enough to meet the braking needs of large aircraft.
At this time, the reverse thrust device came into being.
Large aircraft with reverse thrust devices can even shorten the landing taxiing distance from two or three kilometers to three or four hundred meters, which is almost ten times shorter.
The old American C17 transport aircraft can complete short-distance takeoffs and landings on flat dirt roads, deserts and even grasslands because it is equipped with a large thrust engine with such a reverse thrust device.
The most exaggerated thing is that this thing has also performed full-load takeoffs and landings on the Antarctic ice.
When landing on the ice, the braking force of the landing gear is almost zero, and the braking depends entirely on reverse thrust.
Aircraft decades ago had this performance. If you say you are not envious or jealous, you must be lying…
Currently, reverse thrustThere are three main types of thrust devices.
The first is the baffle-shaped reverse thrust, which is designed by designing the outer shell of the engine jet port into a movable bucket-shaped baffle. When reverse thrust is needed, the outer shell is rotated, like hanging a parachute behind the jet port, changing the direction of the airflow to generate reverse thrust.
This design structure is very simple and reliable, but it is very bulky and inefficient. It is mainly used in turbojet engines and engines with small bypass ratios.
The second is the Yeshan-type reverse thrust device, which is designed to design the outer shell of the engine like a side sliding door, which can be opened by sliding back and forth to open the side air outlet of the engine.
When reverse thrust is needed, the forward jet port of the engine is directly blocked with a choke door, so that all airflow can only pass through the side air outlet and exhaust in a slightly opposite direction to form reverse thrust.
This design structure is relatively complex, but the airflow guidance is very good and the braking efficiency is also high. Many large Boeing passenger aircraft are using this technology.
Finally, there is the baffle-type reverse thrust device, which is a combination of the baffle-shaped and the leaf-shaped. When reverse thrust is needed, its shell will bloom a few petals like a flower. Because the angle of the reverse thrust airflow is relatively large, the effect is also the best.
However, it is not only complex in structure, but also has very high requirements for the sealing of the baffle door, so the technical difficulty has risen to another level.
Through careful observation, Dong Jun quickly determined that the reverse thrust type of Kangchi’s turbofan 30 is the baffle-type with the highest difficulty and the best effect!
This discovery made Dong Jun no longer have the strength to speak, and he didn’t know what to say.
This engine is filled with black technology from inside to outside, from beginning to end, almost every corner that can be stuffed!
It’s outrageous! Dong Jun seriously doubted that its service life can really be 20,000 hours? ! But Dong Jun didn’t dare to ask more, let alone say anything.
After all, my face still hurts a little now…
Like the dozen or so projects before, this WS-30 still performed very stably in the reverse thrust test. When the afterburner was turned on at a bypass ratio of 10, its reverse thrust was as high as 300KN. If an aircraft with a dynamic rear was designed, this thing could even make the aircraft fly backwards…
However, considering that the aircraft needs to maintain a larger gap between the engine and the runway during takeoff and landing to avoid sucking in sand and gravel, the bypass ratio will generally be changed back to 6 in the air. At this time, even if the afterburner is turned on, its maximum reverse thrust is actually only 220KN.
And considering that not every runway condition is suitable for the reverse thrust device, in order to avoid the downward airflow blowing up debris into the engine, the four deflector doors can usually only open the two upward ones. Therefore, in normal use, its reverse thrust will be controlled at around 120NK.
Even so, this double happiness is enough to make everyone who witnessed today’s test unable to sleep.
As soon as the first round of tests ended, Chief Shen immediately pulled Kang Chi aside and asked, “When will the second round of tests begin?”
“It will continue tomorrow.”
”Does it have to be you who presides over it?”
Kang Chi shook his head: “The second round of tests is mainly various stability and extreme tests, which are time-consuming and labor-intensive. I plan to let the engineers of the Aoying Base preside over it, and we will also leave a few engineers here to cooperate.”
”Well, I understand…”
After Chief Shen said he understood, he left the control room in a hurry without even saying hello.
Soon he came to the communication room of the Aoying Flight Test Base and found the red phone…—— Yanjing.
In an antique courtyard, an old man with gray hair was sitting on a wooden chair, reading a thick document carefully.
The title of the document is the analysis of the necessity of China’s construction of a large particle collider and the summary of the opinions of authoritative scholars.
After the Americans restarted the SSC project, the debate on this topic suddenly became intense. I wonder if the military’s strategic absurdity this time has shot itself in the foot…
However, this debate has never stopped, but it’s just that the heat has suddenly increased this time because of the SSC issue.
When the old man saw a certain position in the document, his eyes paused for a moment, then went back and read it carefully.
“Dr. Kang actually stood on the side of Academician Yang?”
“Well, I heard that the cause of this incident was that the military asked Dr. Kang to use the opportunity of Silver Crane to confuse the opponent’s trick.”
The dean of Huake Academy, who was sitting next to the old manChen Qifan immediately explained,
”He himself has never been involved in high-energy physics research, so he also emphasized that this is just his personal emotional opinion and does not have much reference value.”
The old man nodded, then smiled gently and said: “But building a particle collider in space… I guess only he dares to think of this kind of thing.”
Dean Chen also smiled and said: “Dr. Kang is still young after all, and he still has a long way to go in the future. Many things we dare not think of may be realized in their era.”
”Hmm…”
Just when the old man couldn’t help but feel extremely excited about the future and a little regretful, footsteps suddenly came from outside.
The two immediately raised their heads and saw a man in military uniform led by a guard, walking in with slightly hurried steps.
The old man immediately smiled and asked: “Director Ji, why are you walking so fast at night?”
Director Ji took a deep breath, tried to control his excitement, and replied: “I just received a message from Mr. Shen.”
The old man’s eyes flickered.
“Old Shen… he seemed to have gone to the Aoying flight test base yesterday?”
”Yes, today the WS-30 built by Dr. Kang successfully passed the first round of tests, and the results… are quite amazing!”
The moment he heard this, the old man couldn’t help but stand up and looked at Director Ji closely: “Did it really reach 50 tons of thrust?”
”More than 50 tons of thrust… they also broke the historical record!”
”Break the historical record?”
Director Ji nodded with a complicated expression, then took a deep breath to adjust his mood before continuing: “This is a long story, I have to briefly explain to you the several cutting-edge technologies that Dr. Kang used this time…”
So after Director Ji’s explanation for more than ten minutes, the old man finally understood what variable duct, variable circulation and reverse thrust technology are.
“With Dr. Kang’s engine, our passenger planes, transport planes, bombers, and even fleets will have a more powerful heart support in the future.”
”For the Y-20 equipped with the WS-30, if the fuselage material is changed from T1000 carbon fiber to T1200, the full-load range is expected to increase to more than 10,000 kilometers, and the first test flight is expected to be carried out next month. If it is installed on a stealth bomber, the maximum range may even exceed 20,000 kilometers…”
”Great! That’s great!”
After listening to Director Ji’s report, the old man paced back and forth several times in excitement.
The transport plane is okay. If the range is not enough and the load is not enough, it can be barely made up, but the significance of the long-range strategic bomber is completely different.
Although the “B-2” bomber of the United States has a range of only 11,000 kilometers and a combat radius of 5,000-6,000 kilometers, it can threaten any place in the world like a ghost, because the United States has military bases all over the world, and its stealth capability.
It is like a sword of Damocles, always hanging over everyone’s head.
The most powerful bomber currently known to China is the H-6K, which has a maximum range of 8,000 kilometers and a combat radius of 3.5-4,000 kilometers.
Because it has no stealth performance, it acts more like an air launch platform and range extender for cruise missiles, which can greatly reduce the launch cost, strike range and shorten the strike time of missiles.
As a general who defends the land, the H-6K can patrol the border and deter surrounding scoundrels, but if the opponent is the old United States, it is a bit out of reach.
Although the H-20 is also under development, without an engine with such powerful comprehensive performance as the WS-30, its combat radius will not be much farther than that of the H-6K, and it can only be regarded as a medium-range stealth strategic bomber.
If the target is the homeland of the old M, all it can do is fly to the middle of the Pacific Ocean to throw missiles, and then turn around and go home.
One is to throw it directly above the head,
The other is to throw it when the distance is thousands of kilometers. It is obvious which is higher, the difficulty of missile interception or the payload.
If China can have a stealth strategic bomber with a range of 20,000 kilometers, then even if there is no overseas military base, it will hold the same sword of Damocles as the old M.
Although we love peace and like to bury our heads in farming and developing the economy, if someone dares to invade us, we are also capable of directly bombing your hometown! All those who have evil intentions towards China will have to think more in the future!
So soon, after the Elders’ CouncilApproved, a series of projects around WS-30 began to be established rapidly or changed direction.
First, the construction of Y-20 was completely stopped and the Y-20S was transformed.
At the same time, in addition to the Y-20S prototype used to test the WS-30 in order to catch up with the progress, the Y-20S will also redesign the fuselage size and further increase the cargo compartment size of the Y-20S.
The Y-20 in service will also be transformed one after another.
Second, the super-large transport aircraft project ‘Y-30’ was launched.
The goal is to build the world’s largest transport aircraft.
In fact, although there is a demand for super-large transport aircraft, it is not large, so this project is more of a symbolic meaning. Whether it is built for the Chinese people or for the people of the world, it is necessary.
Third, the CJ2000 engine of COMAC C929 project was stopped from development, and the civilian version of WS-30 was purchased from Datang Heavy Industry instead. The civilian version of WS-30 will castrate the variable cycle and variable bypass technologies, and only retain the reverse thrust device.
Fourth, the H-20 development project was also changed to use WS-30, and the fuselage was redesigned, and the number was changed to H-20S.
When Kang Chi heard the retelling of Chief Shen, he couldn’t help but be surprised by such a big move.
Although he was very confident in the WS-30, the test was not over after all. Did the leaders have such confidence in him? “What if the subsequent tests fail?”
”Then continue to improve it.” Chief Shen said nonchalantly, “You have built this prototype and it has passed the first round of tests. The progress is faster than other aero engines, not to mention that the data from the first round is so good.”
”If you really encounter a problem, it’s okay. You can slowly solve it. We can wait. Just tell us if you need any support… If it really doesn’t work, those cutting-edge technologies can be used on the WS-30 first, and then slowly solved later. This is faster than the speed of the CJ2000, right?”
”Yeah, I see.”
”In addition, we want you to be the chief engineer of the ‘Y-30’ and ‘H-20S’… Do you have this intention?”
(End of this chapter)